Incidence trend of hepatitis A and its related factors

ObjectiveTo analyze the incidence trend of hepatitis A and its related factors in Baqiao district, Xian municipality. MethodsDescriptive analysis on the incidence data of hepatitis A from 1990 to 2006 was conducted. ResultsA total of 2146 cases of hepatitis A were reported during this period, which accounted for 18.29% of the total viral hepatitis cases (IP/I＜0.01). The incidence rates from 1990 to 1992 ranged from 72.4/lakh to 94.7/lakh (mean=84.2/lakh).The incidence rates from 1993 to 1999 ranged from 10.5/lakh to 45.3/lakh (mean=34.82/lakh), which shown a decline trend. The incidence rates from 2000 to 2006 ranged from 2.1/lakh to 15.1/lakh (mean=6.79/lakh). The difference on decline by run test had statistical significance (II/I=14, IP/I＜0.01). The incidence rate in Baqiao was highly positive correlated with national one (Irs/I=0.88623,IP/I＜0.01). Four epidemics were observed during this period with a interval of 4-5 years (IP/I＜0.01). The differences on season/year, age, gender and population had statistical significance(IP/I＜0.01). ConclusionThe incidence of hepatitis A was low, but school and kindergarten are still the key places to control and prevent hepatitis A.